CN111006427A - Refrigerator and refrigeration system - Google Patents

Refrigerator and refrigeration system Download PDF

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Publication number
CN111006427A
CN111006427A CN201911336158.5A CN201911336158A CN111006427A CN 111006427 A CN111006427 A CN 111006427A CN 201911336158 A CN201911336158 A CN 201911336158A CN 111006427 A CN111006427 A CN 111006427A
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CN
China
Prior art keywords
air
fan
refrigerating
refrigeration system
duct assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911336158.5A
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Chinese (zh)
Inventor
王贵云
徐文山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Hefei Kinghome Electrical Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Hefei Kinghome Electrical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai, Hefei Kinghome Electrical Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201911336158.5A priority Critical patent/CN111006427A/en
Publication of CN111006427A publication Critical patent/CN111006427A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention relates to a refrigerator and a refrigeration system. During refrigeration, the fan is started and is operated at working voltage, so that wind blown out by the fan can be blown into the refrigerating space through the air supply outlet of the refrigerating chamber. The working voltage is 6V-9V, so that the air quantity entering the refrigerating space can be ensured to be stable, and the temperature fluctuation value is reduced. The working voltage is prevented from being too small, the air quantity entering the refrigerating space from the air supply opening is too small, the cold quantity entering the refrigerating space is too small, the refrigerating effect is poor, and the temperature fluctuation in the refrigerating space is large. Or the working voltage is prevented from being overlarge, so that the air quantity entering the refrigerating space from the air supply opening is overlarge, the cold quantity entering the refrigerating space is overlarge, and the temperature change in the refrigerating space is obvious. The fan operates at the working voltage of 6V-9V, so that the temperature fluctuation value of the refrigerating space can be reduced, and the refrigerating effect of the refrigerating space is ensured.

Description

Refrigerator and refrigeration system
Technical Field
The invention relates to the technical field of refrigerator structures, in particular to a refrigerator and a refrigeration system.
Background
With the continuous improvement of the life quality of people, the requirements of users on the moisture preservation and the fresh keeping of the refrigerating chamber of the refrigerator are higher and higher. However, in the conventional refrigerator refrigerating chamber, along with the operation of the refrigerating chamber, the temperature of the refrigerating chamber is unstable and is in a dynamic change process, and the temperature fluctuation is large, so that the freshness degree of food in the refrigerating chamber is influenced.
Disclosure of Invention
In view of the above, it is necessary to provide a refrigerator and a refrigerating system capable of effectively reducing temperature fluctuation of a refrigerating chamber.
A refrigeration system comprising:
the refrigerating chamber is provided with a refrigerating space and is provided with an air supply outlet; and
the fan is arranged on one side of the refrigerating chamber and can operate at working voltage, the fan can blow air to the refrigerating space through the air supply opening, and the working voltage is 6-9V.
When the refrigeration system is used, the fan is arranged on one side of the refrigerating chamber, and when the refrigeration space of the refrigerating chamber needs to be refrigerated, the fan is started and operates at the working voltage, so that wind blown out by the fan can be blown into the refrigeration space through the air supply opening. The working voltage is 6V-9V, so that the stability of air volume entering the refrigerating space can be further ensured, the stability of temperature in the refrigerating space is ensured, and the temperature fluctuation value is reduced. The working voltage is prevented from being too small, the air quantity entering the refrigerating space from the air supply opening is too small, the cold quantity entering the refrigerating space is too small, the refrigerating effect is poor, and the temperature fluctuation in the refrigerating space is large. Or the working voltage is prevented from being overlarge, so that the air quantity entering the refrigerating space from the air supply opening is overlarge, the cold quantity entering the refrigerating space is overlarge, and the temperature change in the refrigerating space is obvious. The fan operates at the working voltage of 6V-9V, so that the temperature fluctuation value of the refrigerating space can be further reduced, and the refrigerating effect of the refrigerating space is further ensured.
In one embodiment, the operating voltage is 6.5V-8.5V.
In one embodiment, the operating voltage is 7V.
In one embodiment, the refrigeration system further comprises a cold accumulator, and the cold accumulator is arranged between the fan and the air supply outlet of the refrigeration chamber; or
Still include the regenerator, the regenerator set up in the wind gap department of fan.
In one embodiment, the cold accumulator comprises a cold accumulation box and a cold accumulation agent, wherein the cold accumulation agent is arranged in the cold accumulation box, and the phase change temperature of the cold accumulation agent is-0 ℃ to-7 ℃.
In one embodiment, the phase transition temperature is between-4 ℃ and-6 ℃.
In one embodiment, the phase transition temperature is-5 ℃.
In one embodiment, the refrigeration system further comprises an air duct assembly, the fan is arranged in the air duct assembly, an air outlet is formed in one side of the air duct assembly, and the air outlet is correspondingly communicated with the air supply outlet; the air duct assembly is internally provided with a first heat preservation piece, the first heat preservation piece is arranged on the inner wall, provided with the air outlet, of the air duct assembly, the first heat preservation piece is provided with a communication hole, and the air outlet is communicated with the communication hole correspondingly.
In one embodiment, a second heat-insulating part is further arranged in the air duct assembly, and the second heat-insulating part is arranged on the inner wall, facing the first heat-insulating part, of the air duct assembly and is arranged at an interval with the first heat-insulating part.
A refrigerator comprising a refrigeration system as described above.
When the refrigerator is used, the fan is arranged on one side of the refrigerating chamber, and when the refrigerating space of the refrigerating chamber needs to be refrigerated, the fan is started and operates at the working voltage, so that wind blown out by the fan can be blown into the refrigerating space through the air supply opening. The working voltage is 6V-9V, so that the stability of air volume entering the refrigerating space can be further ensured, the stability of temperature in the refrigerating space is ensured, and the temperature fluctuation value is reduced. The working voltage is prevented from being too small, the air quantity entering the refrigerating space from the air supply opening is too small, the cold quantity entering the refrigerating space is too small, the refrigerating effect is poor, and the temperature fluctuation in the refrigerating space is large. Or the working voltage is prevented from being overlarge, so that the air quantity entering the refrigerating space from the air supply opening is overlarge, the cold quantity entering the refrigerating space is overlarge, and the temperature change in the refrigerating space is obvious. The fan operates at the working voltage of 6V-9V, so that the temperature fluctuation value of the refrigerating space can be further reduced, the refrigerating effect of the refrigerating space is ensured, and the refrigerating effect of the refrigerator is ensured.
Drawings
FIG. 1 is a schematic diagram of a refrigeration system in one embodiment;
FIG. 2 is a graph of operating voltage versus temperature fluctuation in the refrigerated space in one embodiment.
Description of reference numerals:
10. the cold storage system comprises a cold storage system 100, a fan 200, an air duct assembly 210, an air outlet 220, a support 222, an air inlet 230, an air casing 240, a first heat preservation piece 242, a communication hole 250, a second heat preservation piece 300 and a cold accumulator.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Referring to fig. 1, in an embodiment of the refrigeration system 10, the stability of the refrigeration temperature can be effectively ensured, and the fluctuation of the refrigeration temperature can be reduced, so as to ensure the refrigeration effect. Specifically, the refrigeration system 10 includes a refrigeration compartment and fan 100. A refrigerating space is formed in the refrigerating chamber, and an air supply outlet is formed in the refrigerating chamber. The blower fan 100 is disposed at one side of the refrigerating chamber. The blower 100 can be operated at a working voltage, and the blower 100 can blow air to the refrigerating space through the air supply opening, wherein the working voltage is 6-9V.
When the refrigeration system 10 is used, the fan 100 is disposed at one side of the refrigerating chamber, and when the refrigerating space of the refrigerating chamber needs to be refrigerated, the fan 100 is started and operated at the operating voltage, so that wind blown by the fan 100 can be blown into the refrigerating space through the air supply opening. The working voltage is 6V-9V, so that the stability of air volume entering the refrigerating space can be further ensured, the stability of temperature in the refrigerating space is ensured, and the temperature fluctuation value is reduced. The working voltage is prevented from being too small, the air quantity entering the refrigerating space from the air supply opening is too small, the cold quantity entering the refrigerating space is too small, the refrigerating effect is poor, and the temperature fluctuation in the refrigerating space is large. Or the phenomenon that the air quantity entering the refrigerating space from the air supply outlet is too large and the cold quantity entering the refrigerating space is too large due to too large working voltage is avoided, and further the temperature change in the refrigerating space is obvious is avoided. The temperature fluctuation value of the refrigerating space can be further reduced by operating the fan 100 at the operating voltage of 6V-9V.
Referring to FIG. 2, in one embodiment, the operating voltage is 6.5V-8.5V. The stable working voltage is 6.5V-8.5V, so that the stability of the air supply quantity of the fan 100 can be further ensured, and the temperature fluctuation value of the refrigerating space is further reduced.
In this embodiment, the operating voltage is 7V. In the process that the working voltage of the fan 100 is continuously increased on the basis of 7V, the air supply volume of the fan 100 is continuously increased along with the increase of the working voltage of the fan 100. The temperature fluctuation value of the refrigerating space keeps rising in the jumping process, and particularly the rising speed between 7V and 10V is high. In the process that the working voltage of the fan 100 is continuously reduced on the basis of 7V, the temperature fluctuation value of the refrigerating space keeps rising in the jumping process along with the reduction of the working voltage of the fan 100. And then fan 100 is with the voltage operation of 7V for the cold-stored space temperature fluctuation reaches minimum, has effectively guaranteed the cold-stored effect of cold-stored space to food.
Referring to fig. 1 again, in an embodiment, the refrigeration system 10 further includes an air duct assembly 200, the fan 100 is disposed in the air duct assembly 200, an air outlet 210 is disposed at one side of the air duct assembly 200, and the air outlet 210 is correspondingly communicated with the air supply outlet. The air outlet 210 is correspondingly communicated with the air supply outlet, so that air generated by the fan 100 can be conveniently and effectively blown into the refrigerating space.
In this embodiment, one side of the air duct assembly 200 is provided with at least three air outlets 210 spaced apart from each other in the vertical direction. The at least three air outlets 210 are arranged at intervals in the vertical direction, so that air blown out by the fan 100 can be blown out more uniformly through different air outlets 210, and the uniformity of refrigeration of the refrigerating space is improved.
Specifically, one side of the air duct assembly 200 is provided with four air outlets 210 at intervals along the vertical direction, so that the uniformity of the air outlet can be further improved. Further, one side of the air duct assembly 200 is provided with at least two air outlets 210 at the same height, so as to further improve the uniformity of the air outlet.
In an embodiment, the air duct assembly 200 includes a bracket 220 and an air casing 230, the blower 100 is mounted on the bracket 220, the air casing 230 covers the bracket 220, and the air outlet 210 is opened on the air casing 230. The mounting of the fan 100 is facilitated by the bracket 220, and the air blown out by the fan 100 is blown out through the air outlet 210 through the space formed by the air shell 230.
In an embodiment, a first thermal insulation member 240 is disposed in the air duct assembly 200, the first thermal insulation member 240 is disposed on an inner wall of the air duct assembly 200, where the air outlet 210 is formed, a communication hole 242 is formed in the first thermal insulation member 240, and the air outlet 210 and the communication hole 242 are correspondingly communicated. Specifically, the first thermal insulation member 240 is disposed on the inner wall of the wind casing 230, which is opened with the wind outlet 210. Because the air blown out by the fan 100 is blown out from the air outlet 210 through the communication hole 242, the stability of the cooling capacity of the air in the air duct assembly 200 can be effectively ensured through the first heat preservation member 240, and the cooling capacity of the air in the air duct assembly 200 is prevented from being emitted from the side wall of the air duct assembly 200.
Further, the first thermal insulation member 240 is attached to the inner wall of the air duct assembly 200, which is provided with the air outlet 210. Through pasting, a gap can be prevented from being formed between the first heat preservation part 240 and the inner wall of the air duct assembly 200, which is provided with the air outlet 210, and it is ensured that the wind in the air duct assembly 200 can be effectively blown out from the air outlet 210.
In this embodiment, the first thermal insulation member 240 is a foam board. Through the foam board, the heat preservation effect can be improved, meanwhile, a certain noise reduction effect can be achieved, and certain noise generated when wind blown out by the fan 100 directly blows to the inner wall of the air duct assembly 200, which is provided with the air outlet 210, is avoided. In other embodiments, the first insulating member 240 may be made of other insulating materials.
In an embodiment, a second thermal insulation member 250 is further disposed in the air duct assembly 200, and the second thermal insulation member 250 is disposed on an inner wall of the air duct assembly 200 facing the first thermal insulation member 240 and spaced apart from the first thermal insulation member 240. The second heat preservation piece 250 can further improve the heat preservation effect of the wind in the air duct assembly 200, prevent the cold quantity from dissipating and prevent the external heat from being transferred in. Meanwhile, the second heat preservation part 250 and the first heat preservation part 240 are arranged at intervals, so that the wind generated by the fan 100 exists between the first heat preservation part 240 and the second heat preservation part 250, and the heat preservation effect of the wind sent out by the fan 100 is improved.
Specifically, the second heat preservation member 250 and the fan 100 are arranged on the bracket 220 in parallel, so that the cold energy of the wind generated by the fan 100 is prevented from being emitted from one side of the bracket 220.
In one embodiment, the second insulating member 250 may be a foam board. Of course, the second insulating member 250 may be made of other insulating materials.
In one embodiment, the refrigeration system further includes a cold accumulator 300, and the cold accumulator 300 is disposed at an air inlet of the fan 100. When the refrigerating space of the refrigerating chamber needs to be refrigerated, the fan 100 is started, the fan 100 is operated at the working voltage, the air is blown out of the fan 100 through the cold accumulator 300, the temperature of the air blown out of the fan 100 can be effectively guaranteed to be stable by the cold accumulator 300, and the temperature fluctuation value in the refrigerating space is reduced.
Specifically, the bracket 220 is provided with an air inlet 222, the fan 100 is disposed on the bracket 220, an air inlet of the fan 100 is correspondingly communicated with the air inlet 222 of the bracket 220, and the cold accumulator 300 is disposed on the bracket 220 and located at the air inlet 222. The regenerator 300 can be further effectively installed by the support 220 while allowing wind to be effectively blown out by the fan 100 through the regenerator 300.
In another embodiment, the cold accumulator 300 is disposed between the fan 100 and the air supply opening of the refrigerating chamber, and the air supplied from the fan 100 may be blown into the refrigerating space through the air supply opening after passing through the cold accumulator 300, or the air may be blown out from the fan 100 through the cold accumulator 300.
In one embodiment, the regenerator 300 includes a cold storage box and a cold storage agent, the cold storage agent is disposed in the cold storage box, and the phase change temperature of the cold storage agent is-0 ℃ to-7 ℃. The refrigerating temperature of the refrigerating temperature space is generally 0-8 ℃, so the phase change temperature of the coolant is set to-0 ℃ to-7 ℃, and the temperature in the refrigerating temperature space is conveniently stabilized between 0 ℃ and 8 ℃.
Specifically, the phase transition temperature is-4 ℃ to-6 ℃. The air supply temperature of the fan 100 can be further stabilized, and the temperature fluctuation value of the refrigerating space is further reduced. In this example, the phase transition temperature is-5 ℃. The cold storage box can obstruct the heat exchange effect of the cold storage agent, and the utilization rate of the cold storage amount of the cold storage agent at the phase change temperature of-5 ℃ is higher, so that the temperature fluctuation value of the cold storage space can be further reduced.
In other embodiments, the phase transition temperature of the coolant may also be adjusted according to the set temperature of the refrigerated space. For example, when the set temperature of the refrigerating space is high, the phase transition temperature of the coolant may be increased; if the setting temperature of the refrigerating space is lower, the phase change temperature of the coolant can be reduced.
The refrigerator in one embodiment comprises the refrigeration system 10 in any one of the embodiments, and the refrigeration system 10 can effectively keep the temperature of the refrigeration space stable, reduce the temperature fluctuation value, and effectively provide the refrigeration effect of the refrigerator.
The above-mentioned embodiments only express a few embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A refrigeration system, comprising:
the refrigerating chamber is provided with a refrigerating space and is provided with an air supply outlet; and
the fan is arranged on one side of the refrigerating chamber and can operate at working voltage, the fan can blow air to the refrigerating space through the air supply opening, and the working voltage is 6-9V.
2. A refrigeration system as set forth in claim 1 wherein said operating voltage is between 6.5V and 8.5V.
3. A refrigeration system as set forth in claim 2 wherein said operating voltage is 7V.
4. The refrigeration system as recited in claim 1 further comprising a cold accumulator disposed between the fan and the supply air outlet of the refrigerating compartment; or
Still include the regenerator, the regenerator set up in the wind gap department of fan.
5. A cold storage system according to claim 4, wherein the cold accumulator comprises a cold storage box and a cold storage agent, the cold storage agent is arranged in the cold storage box, and the phase transition temperature of the cold storage agent is-0 ℃ to-7 ℃.
6. A refrigeration system as claimed in claim 5, wherein the phase transition temperature is in the range-4 ℃ to-6 ℃.
7. A refrigeration system as claimed in claim 6, wherein the phase transition temperature is-5 ℃.
8. The refrigeration system as claimed in any one of claims 1 to 7, further comprising an air duct assembly, wherein the fan is disposed in the air duct assembly, an air outlet is formed at one side of the air duct assembly, and the air outlet is correspondingly communicated with the air supply outlet; the air duct assembly is internally provided with a first heat preservation piece, the first heat preservation piece is arranged on the inner wall, provided with the air outlet, of the air duct assembly, the first heat preservation piece is provided with a communication hole, and the air outlet is communicated with the communication hole correspondingly.
9. The refrigeration system of claim 8, further comprising a second insulating member disposed within the air duct assembly, the second insulating member being disposed on an inner wall of the air duct assembly facing the first insulating member and spaced apart from the first insulating member.
10. A refrigerator comprising a refrigeration system as claimed in any one of claims 1 to 9.
CN201911336158.5A 2019-12-23 2019-12-23 Refrigerator and refrigeration system Pending CN111006427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911336158.5A CN111006427A (en) 2019-12-23 2019-12-23 Refrigerator and refrigeration system

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Application Number Priority Date Filing Date Title
CN201911336158.5A CN111006427A (en) 2019-12-23 2019-12-23 Refrigerator and refrigeration system

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CN111006427A true CN111006427A (en) 2020-04-14

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1186213A (en) * 1996-12-27 1998-07-01 大宇电子株式会社 Method of controlling fan motor and refrigerator employing the same
CN102506536A (en) * 2011-09-30 2012-06-20 合肥美的荣事达电冰箱有限公司 Air indirect cooling refrigerator and temperature control method thereof
CN105674668A (en) * 2016-02-25 2016-06-15 合肥华凌股份有限公司 Air flue assembly and refrigerator
CN108224883A (en) * 2017-11-30 2018-06-29 青岛海尔特种电冰柜有限公司 The assemble method of ducting assembly, refrigeration equipment and ducting assembly
CN108387052A (en) * 2017-12-28 2018-08-10 青岛海尔特种电冰柜有限公司 The air-cooled vertical refrigeration equipment of multi-temperature zone

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1186213A (en) * 1996-12-27 1998-07-01 大宇电子株式会社 Method of controlling fan motor and refrigerator employing the same
CN102506536A (en) * 2011-09-30 2012-06-20 合肥美的荣事达电冰箱有限公司 Air indirect cooling refrigerator and temperature control method thereof
CN105674668A (en) * 2016-02-25 2016-06-15 合肥华凌股份有限公司 Air flue assembly and refrigerator
CN108224883A (en) * 2017-11-30 2018-06-29 青岛海尔特种电冰柜有限公司 The assemble method of ducting assembly, refrigeration equipment and ducting assembly
CN108387052A (en) * 2017-12-28 2018-08-10 青岛海尔特种电冰柜有限公司 The air-cooled vertical refrigeration equipment of multi-temperature zone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
龚勤勤、朱晓亮、吴墨、胡学洋、方忠诚: "带有蓄冷盒的风冷冰箱冷藏室温度波动特性研究", 《带有蓄冷盒的风冷冰箱冷藏室温度波动特性研究 *

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